Over the years of teaching, I've seen the same sort of issues crop up again and…again with my students who are just beginning in 3D animation.…One of these is improper usage of the Scale tool.…I've reverted back to this very simple example of a robot arm because I think…it's a better illustration of what the problem is.…That problem is if you non-uniformly scale an object, if you stretch it in one…direction with the Scale tool and then link it up to other objects, you're…going to get some very, very ugly skewing problems that are a direct consequence…of the fact that you've non-uniformly scaled objects.…

As I kind of mentioned earlier on in the course, scaling is problematic, or to…put it even more bluntly, scaling is evil if you don't know exactly what you're doing.…So here's an example.…I've got a box down here.…That's going to be part of my robot arm, but it's not tall enough.…So if I didn't know any better, I would just scale the box up. So let's try that.…Grab the Scale tool and scale it up in Z until it's about 400% of its original size.…